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Long working short-acting insulin

Dennis78

Newbie
Messages
3
Type of diabetes
Type 1
Treatment type
Pump
Since the beginning of my diabetes career i'm having issues to which no one seems to have answers.
One of those things is that my lunch bolus is working too strong at a time where it should not noticeably have any affect anymore. I'm talking about 5 hours after lunch and sometimes even more.
Very much longer than short-acting inline should be active.
At around 4 pm i have to take carbohydrates to prevent a hypo. After that BS rises but starts dropping again within half an hour. And again i have to take extra CH to prevent a hypo. This could go on till 8 pm. 8 hours after last insuline. No excercise or activity is involved. I've been tested multiple times if my pancreas is still producing insuline which is not the case.

I've had multiple brands and types of insuline but they all act kind of the same way.

When i was on pen injections, 10 years ago and before, my doctor convinced me to go on pump to address this problem, among other things. He thought my afternoon-problem was caused by basal insuline. The theory was that by switching to pump and setting the basal level to zero between around noon and 6 pm the problem would be gone. But nothing noticeable happened here.
Basal on pump after 12 is at the lowest rate so practically zero so the drops in the afternoon could only be caused by the lunch bolus insuline.
Problem is only in the afternoon. Bolusses after breakfast and supper seems to act normal concerning effectiveness in time range.

Anyone recognizing this problem?
 
Hi @Dennis78
Welcome.
Mine does the same but i do it deliberately.....
I overload my background insulin to keep myself in the 5s.
I have an active job where i'm on my feet so graze on 10g carbs to stay level during the day.
I have 50 years of MDI and a CGM and my last HBA1C was 39 or 5.7.
I only class a hypo at below 3 as i function normally above 3 and never passed out or been hospitalised.


I would never recommend this to anybody.

The big game changer came when i got my libre and bought a miaow miaow that had xdrip running.

I analysed the data to the nth degree and i live next to the pennines so went walking alot to see the effect it had on my levels.

So activity and too much insulin is the culprit for me but you are saying its different for you?
Novorapid lasts 5 hours and sometimes longer if i'm active and my levels drop quickly.
If i'm dropping just off my levemir my levels drop but nowhere near as quickly.

I have no idea if this helps but i wish you well.

Tony
 
Its a feature and depends how you monitor it (numbers can be made to read anything.... ;-) ).

So you can get residual fast acting over a period of hours way longer than we are told - and that can give lows as the insulin in system builds throughout the day.

e.g. I run a fully-closed-loop using Fiasp and have the Duration of Insulin Action set at 10 hours to prevent the low.

Have a read at: https://www.diabettech.com/why-we-a...n-action-dia-times-we-use-and-why-it-matters/
 
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